Home / 28,431.16-39,237.40-15,685.52

Finding the Fourth Proportional to 28,431.16, 39,237.40 and 15,685.52

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Solution

The fourth proportional to 28,431.16, 39,237.40 and 15,685.52 is: 21,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.16 : 39,237.40 = 15,685.52 : x
  2. Step 2: Convert to fraction form
    28,431.16/39,237.40 = 15,685.52/x
  3. Step 3: Cross multiply
    28,431.16x = 39,237.40 × 15,685.52
  4. Step 4: Simplify right side
    28,431.16x = 615,459,022.45
  5. Step 5: Solve for x
    x = 615,459,022.45/28,431.16
  6. Step 6: Final answer
    x = 21,647.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.